Source routing with iRules

Hi Ed,

For performance and ease of management, you could combine all of the addresses/subnets that have a common destination IP into an address datagroup and then use matchclass (9.x) or class match (10.x) to look up the client IP. To check whether a match is being made, you could add logging to the iRule:

when CLIENT_ACCEPTED {
   log local0. "[IP::client_addr]:[TCP::client_port]: destination [IP::local_addr]:[TCP::local_port]"

    Check if client IP is in the my_subnets_class datagroup
   if {[class match [IP::client_addr] equals my_subnets_class]}{
      log local0. "[IP::client_addr]:[TCP::client_port]: Matched my_subnets_class, using 10.130.32.1"
      node 10.130.32.1
   } else {
      node 10.130.4.1
      log local0. "[IP::client_addr]:[TCP::client_port]: Matched my_subnets_class, using 10.130.32.1"
   }
}

If you're testing with ICMP, make sure your virtual server type is defined as all protocols.

Aaron